JP6276085B2 - Test equipment and test unit - Google Patents

Description

  The present invention relates to an engine test apparatus and a test unit.

  As an engine test apparatus, an apparatus that performs a test without burning fuel has been proposed. For example, Patent Document 1 discloses an apparatus for measuring pressure fluctuations in an intake port and an exhaust port by rotating a crankshaft with an electric motor.

  A unit that measures pressure fluctuations in an intake port and an exhaust port generally includes a pipe connected to the port, a sensor that detects a pressure in the pipe, and a pipe valve that opens and closes the pipe. As a test example, for example, there is a test for confirming whether the response of the intake / exhaust valve is within a reference value in the overlap zone of the intake / exhaust valve. In this case, open the intake side pipe, close the exhaust side pipe and measure the intake side pressure fluctuation, and conversely open the exhaust side pipe, close the intake side pipe and close the exhaust side pipe. Measure pressure fluctuations.

Japanese Patent No. 4315957

  From the viewpoint of pressure fluctuation measurement accuracy, it is preferable that the volume in the pipe from the port to the pipe valve is small. If the volume in the pipe is large, the response to pressure fluctuations will decrease. Therefore, it is preferable that the piping length from the port to the piping valve is as short as possible.

  On the other hand, as a valve for piping, a valve with an actuator such as an air cylinder is used in terms of automating the opening and closing of the valve by automatic control. However, a valve with an actuator requires a space for arranging the actuator, and there is a limit to shortening the pipe length.

  An object of the present invention is to enable automatic opening / closing of a valve and to shorten a pipe length.

According to the present invention, there is provided a test unit for testing a multi-cylinder engine having a plurality of ports including an intake port and an exhaust port in a pseudo drive state, and a plurality of pressure inspection units and at least one open / close Each of the plurality of pressure inspection units includes a pipe connected to one of the plurality of ports and a valve for opening and closing the pipe, and the pipe includes the intake port. Or an attachment portion provided at a position between the exhaust port and the valve, to which a sensor for detecting a pressure in the pipe is attached, and the opening / closing mechanism is connected to one actuator and the actuator, the driving force of the actuator is transmitted to the operation units of the plurality of valves, e Bei and a transmission mechanism for opening and closing said plurality of valves, the transmission mechanism, before A slide member that is slidable in the cylinder row direction by driving of the actuator, a handle member that is connected to each operation portion of the plurality of valves, and a tip end side that engages with the other end portion of the handle member And a link member whose root side is fixed to the slide member, respectively, is provided .
Further, according to the present invention, there is provided a test apparatus for testing a multi-cylinder engine having a plurality of ports including an intake port and an exhaust port in a pseudo driving state, including a plurality of pressure inspection units and at least one pressure inspection unit. An opening / closing mechanism, wherein each of the plurality of pressure inspection units includes a pipe connected to one of the plurality of ports, a sensor for detecting a pressure in the pipe, and a valve for opening / closing the pipe. The test apparatus includes a support unit that supports the plurality of pressure inspection units, an inspection position where the pipe is connected to the port, and a retracted position where the pipe is separated from the port. A moving mechanism that moves the support unit; and a buffer mechanism that is provided between the support unit and the moving mechanism and that displaceably connects these relative positions. The opening / closing mechanism includes one actuator and a transmission mechanism that is connected to the actuator and transmits the driving force of the actuator to each operation unit of the plurality of valves to open and close the plurality of valves. A test device is provided .
Further, according to the present invention, there is provided a test apparatus for testing a multi-cylinder engine having a plurality of ports including an intake port and an exhaust port in a pseudo driving state, including a plurality of pressure inspection units and at least one pressure inspection unit. An opening / closing mechanism, wherein each of the plurality of pressure inspection units includes a pipe connected to one of the plurality of ports, a sensor for detecting a pressure in the pipe, and a valve for opening / closing the pipe. The test apparatus includes a support unit that supports the plurality of pressure inspection units, an inspection position where the pipe is connected to the port, and a retracted position where the pipe is separated from the port. An elevating mechanism that elevates and lowers the support unit; and a buffer mechanism that is provided between the support unit and the elevating mechanism and that displaceably connects these relative positions. The opening / closing mechanism includes one actuator and a transmission mechanism that is connected to the actuator and transmits the driving force of the actuator to each operation unit of the plurality of valves to open and close the plurality of valves. A test device is provided .

  According to the present invention, the opening and closing of the valve can be automated, and the piping length can be further shortened.

1 is a schematic diagram of a test apparatus according to an embodiment of the present invention. FIG. 2 is a view taken along line II in FIG. 1. Explanatory drawing of a pressure inspection unit. The perspective view of a test unit and a moving mechanism. The perspective view of a test unit and its periphery. Explanatory drawing of the lower part of a test unit. Explanatory drawing of the lower part of a test unit. Operation | movement explanatory drawing of an opening-and-closing mechanism.

  Hereinafter, embodiments of the present invention will be described. In each figure, an arrow Z indicates a vertical direction, and arrows X and Y indicate horizontal directions orthogonal to each other.

  FIG. 1 is a schematic view of a test apparatus 1 according to an embodiment of the present invention, and FIG. 2 is a view taken along the line II in FIG. If FIG. 1 is a front view of the test apparatus 1, FIG. 2 corresponds to a plan view excluding a part of the configuration of the test apparatus 1. In FIG. 1, the specific configuration of the transport apparatus 100 is omitted.

  The test apparatus 1 takes in the engine E transported in the X direction by the transport apparatus 100 such as a roller conveyor, performs the test, and returns the engine E to the transport apparatus 100 again after the test. The test that the test apparatus 1 performs on the engine E is a test that is performed in a pseudo drive state that does not involve fuel combustion, and is a device that performs a so-called cold test.

  The engine E is a multi-cylinder engine. The multi-cylinder engine to which the present invention is applicable is not particularly limited in the number of cylinders and the cylinder arrangement, but in the present embodiment, a V-type 6-cylinder engine is assumed. In the engine E, the cylinder row direction is the Y direction, and three cylinders are arranged in one bank. One intake port IP is provided independently for each cylinder, and a total of six intake ports IP are arranged between the banks. In the case of this embodiment, the exhaust port EP is a collective exhaust port, and is provided in total, two for each bank. Needless to say, the present invention can also be applied to the case where the exhaust port EP is independently configured for each cylinder.

<Configuration of test equipment>
The test apparatus 1 includes a transport mechanism 2, a drive unit 3, test units 4 and 5, a moving mechanism 6, a buffer mechanism 7, and moving mechanisms 8L, 8R, 9L, and 9R. Note that the symbol L at the end of the symbol indicates a configuration corresponding to the test of the left bank as viewed in FIG. 1, and the symbol R indicates a configuration corresponding to the test of the right bank as viewed in FIG. . These symbols L and R may be omitted when it is not necessary to distinguish between these configurations. For example, when the moving mechanism 8L and the moving mechanism 8R are not distinguished from each other, the moving mechanism 8 may be simply indicated.

  The transport mechanism 2 takes in the test apparatus 1 a transport device 100 that transports the pallet P on which the engine E is mounted in the X direction, and an engine E (mounted on the pallet P) transported by the transport device 100, and performs a test. A mechanism for returning the completed engine E to the transport apparatus 100, that is, a movable transport unit 22 is configured. The conveyance device 100 is configured by a pair of roller conveyors 101 extending in the X direction, and includes a stop device that positions a workpiece at a predetermined position. The movable transport unit 22 includes a lift unit 23 that lifts and lowers the pallet P, a pair of guide rollers 21 extending in the Y direction, a slider (not shown) that is movable along the guide rollers 21, And a drive unit 24 for driving in the direction. Examples of the drive unit 24 include known linear drive units such as a ball screw unit and a linear motor unit. Moreover, as the guide roller 21, a free roller is mentioned, for example.

  The engine E to be tested is mounted on the pallet P and is transported on the transport device 100. When the pallet P on which the engine E is mounted reaches the movable conveyance unit 22, the pallet P is positioned and fixed at a predetermined position by the stop device. Thereafter, the slider is slid to the engagement position with the pallet P by the drive unit 24, and the pallet P is raised by the elevating unit 23. As a result, the pallet P enters the lower recess of the slider and is connected to the pallet P. Thereafter, the slider is slid toward the test apparatus 1 by the drive unit 24.

  The slider conveys the engine E together with the pallet P to the test position (the position of the engine E indicated by a broken line in FIG. 2), and waits as it is during the test. After the test is completed, the slider is again slid to the pallet P side by the drive unit 24, and the pallet P is transferred to the transport device 100 and transported. In this way, the engine E can be continuously tested.

  The drive unit 3 includes a drive source 31 such as an electric motor and a chuck 32 rotated by the drive source 31. When the engine E reaches the test position, the crank shaft of the engine E and the drive source 31 are connected by the chuck 32. By driving the drive source 31, the crankshaft rotates, and the engine E can be put in a pseudo drive state.

  The test units 4 and 5 are units for measuring pressure fluctuations in the intake port IP and the exhaust port EP when the engine E is in a pseudo driving state.

  As shown in FIG. 1, the test unit 4 includes a plurality of pressure inspection units 41L (details will be described later) corresponding to the three intake ports IP of the left bank, one open / close mechanism 42L, and one support unit 43L. A plurality of pressure inspection units 41R corresponding to the three intake ports IP of the right bank, one opening / closing mechanism 42R, and one support unit 43R are provided.

  The test unit 5 includes one pressure inspection unit 51L (details will be described later), one opening / closing mechanism 52L and one support unit 53L corresponding to one exhaust port EP of the left bank as viewed in FIG. One pressure inspection unit 51R corresponding to one exhaust port EP, one opening / closing mechanism 52R, and one support unit 53R are provided.

  The moving mechanism 6 moves the test unit 4 via the buffer mechanism 7. In the present embodiment, a case where the intake port IP is arranged to open substantially upward at the upper part of the engine E is taken as an example. Therefore, in this embodiment, the moving mechanism 6 is a lifting mechanism that moves the test unit 4 up and down as indicated by an arrow d1 in FIG. 1, and moves the test unit 4 between the inspection position and the retracted position. The inspection position is a position where the pipe 411 included in the pressure inspection unit 41 is connected to the intake port IP, and the retreat position is a position where the pipe 411 is separated from the intake port IP. When the engine E is taken into the test apparatus 1 from the transport apparatus 100, the test unit 4 is moved to the retracted position, and an accommodation space for the engine E is secured. When performing the test, the test unit 4 is moved to the inspection position, and the pipe 411 is connected to the intake port IP.

  The moving mechanisms 8L and 9L are mechanisms for moving the support unit 53L, and the moving mechanisms 8R and 9R are mechanisms for moving the support unit 53R. The pressure inspection unit 51 and the opening / closing mechanism 52 are mounted on a support unit 53. The moving mechanisms 8 and 9 move the support unit 53 to move the pressure inspection unit 51 and the opening / closing mechanism 52 between the inspection position and the retracted position. 1 and 2 illustrate a case where the pressure inspection unit 51L is in the retracted position and the pressure inspection unit 51R is in the inspection position. The inspection position is a position where the tip of the pipe 511 provided in the pressure inspection unit 51 is connected to the exhaust port EP, and the retracted position is a position where the pipe 511 is separated from the exhaust port EP.

  The exhaust port EP opens to the outer wall of the bank, and the outer wall is inclined obliquely downward. The moving mechanism 8 advances and retracts the support unit 53 in a direction substantially orthogonal to the outer wall of the bank as indicated by an arrow d3. The moving mechanism 9 includes a pair of rails 91 extending in the X direction and a slider 92 that moves by guiding the rails 91. The moving mechanism 8 is mounted on the slider 92 and is moved in the X direction by the moving mechanism 9. That is, the support unit 53 is moved in two directions, the X direction and the oblique direction.

  The moving mechanism 8 can be composed of, for example, an air cylinder or an electric cylinder. The moving mechanism 9 can be composed of, for example, a driving source such as a motor and a transmission mechanism (for example, a belt transmission mechanism, a ball screw mechanism, a rack-pinion mechanism, etc.) that transmits the driving force of the driving source. Further, the moving mechanism 9 may be constituted by an air cylinder, an electric cylinder or the like.

<Pressure inspection unit>
The pressure inspection units 41 and 51 and conventional problems will be described with reference to FIG. The figure shows a mode at the time of a test by the pressure inspection units 41 and 51, and the pressure inspection units 41 and 51 are located at the inspection position. In the present embodiment, as described above, it is assumed that the exhaust port EP is a collective exhaust port. However, in order to simplify the explanation, in FIG. Show.

  One pressure inspection unit 41 is provided for each intake port IP. In the present embodiment, since six intake ports IP are provided, six pressure inspection units 41 are also provided. The pressure inspection unit 41 includes a pipe 411, a valve 412, and a pressure sensor 413.

  The pipe 411 is connected to the intake port IP, and its internal space communicates with the intake port IP. The pipe 411 is made of, for example, a metallic cylindrical member, but a sealing material such as rubber may be provided at the tip end portion 411a so as to be in airtight contact with the opening periphery of the intake port IP.

The peripheral wall of the pipe 411, the mounting portion 411b is provided are found attach the pressure sensor 413. The attachment portion 411b is formed at a position between the intake port IP and the valve 412. The attachment portion 411b is formed by forming a through hole communicating with the internal space of the pipe 411 in a boss portion to which the pressure sensor 413 is fastened with a screw or the like, and the detection portion of the pressure sensor 413 is inserted into the through hole in an airtight manner. Is done. The pressure sensor 413 is a sensor that measures the atmospheric pressure, and detects the pressure in the internal space of the pipe 411.

  By opening and closing the valve 412, the cross-sectional opening of the pipe 411 is opened / closed. When opened, the intake port IP communicates with the atmosphere. When closed, the intake port IP communicates with the atmosphere. In the case of this embodiment, the valve 412 is assumed to be a ball valve. The valve 412 includes an operation unit 412a and a spherical valve body 412b. In the case of the present embodiment, the operation unit 412a is a valve shaft connected to the valve body 412b. By rotating the operation unit 412a around the axis, the valve body 412b rotates and the valve 412 is opened and closed. The rotation range of the operation unit 412a and the valve body 412b is assumed to be 90 degrees, and the valve body 412b can be switched between the open state and the closed state by rotating the operation unit 412a by 90 degrees. The operation unit 412a is rotated by an opening / closing mechanism 42 connected to the operation unit 412a. By driving the opening / closing mechanism 42, the operation unit 412a is rotated and the valve 412 is opened / closed. The opening / closing mechanism 42 is as described later.

  One pressure inspection unit 51 is provided for each exhaust port EP. In the present embodiment, since two exhaust ports EP are provided, two pressure inspection units 51 are also provided. The pressure inspection unit 51 has the same configuration as the pressure inspection unit 41.

  The pressure inspection unit 51 includes a pipe 511, a valve 512, and a pressure sensor 513. The pipe 511 is connected to the exhaust port EP, and its internal space communicates with the exhaust port EP. The pipe 511 is made of, for example, a metal cylindrical member, and the tip end portion 511a can be made of a sealing material such as rubber so as to be in airtight contact with the opening periphery of the exhaust port EP.

  An attachment portion 511b to which the pressure sensor 513 is attached is provided on the peripheral wall of the pipe 511. The attachment portion 511b is formed at a position between the exhaust port EP and the valve 512. The attachment portion 511b is formed by forming a through hole communicating with the internal space of the pipe 511 in a boss portion to which the pressure sensor 513 is fastened with a screw or the like, and the detection portion of the pressure sensor 513 is inserted into the through hole in an airtight manner. Is done. The pressure sensor 513 is a sensor that measures atmospheric pressure, and detects the pressure in the internal space of the pipe 511.

  By opening and closing the valve 512, the cross-sectional opening of the pipe 511 is opened / closed. When opened, the exhaust port EP communicates with the atmosphere, and when closed, the exhaust port EP communicates with the atmosphere. In the present embodiment, the valve 512 is assumed to be a ball valve. The valve 512 includes an operation unit 512a and a spherical valve body 512b. In the case of the present embodiment, the operation unit 512a is a valve shaft connected to the valve body 512b. By rotating the operation unit 512a around the axis, the valve body 512b rotates and the valve 512 is opened and closed. The rotation range of the operation unit 512a and the valve body 512b is assumed to be 90 degrees, and the valve body 512b can be switched between an open state and a closed state by rotating the operation unit 512a by 90 degrees. The operation unit 512a is rotated by an opening / closing mechanism 52 connected to the operation unit 512a. By driving the opening / closing mechanism 52, the operation unit 512a is rotated and the valve 512 is opened / closed. The opening / closing mechanism 52 is as described later.

  In the test of the engine E, for example, the valve 412 is opened, the valve 512 is closed, and the drive of the drive unit 3 causes the engine E to be in a pseudo drive state. Then, the pressure sensor 513 measures the pressure fluctuation of the exhaust port EP. Further, for example, the valve 412 is closed, the valve 512 is opened, and the engine E is put in a pseudo drive state by driving the drive unit 3. Then, the pressure fluctuation of the intake port IP is measured by the pressure sensor 413.

  In order to measure the pressure fluctuation of each port more instantaneously, a higher pressure is required, which depends on the volume in each port and the volume of the internal space of the pipes 411 and 511, and the pipes 411 and 511. It is effective to reduce the volume of the internal space of the chamber as much as possible. That is, it is effective to shorten the piping length L1 from the intake port IP to the valve 412 and the piping length L2 from the exhaust port EP to the valve 512.

  In order to shorten the pipe lengths L1 and L2, it is necessary to bring the valves 412 and 512 closer to the intake port IP and the exhaust port EP. However, there is a pressure sensor 413 between the valve 412 and the intake port IP, and it is necessary to secure an arrangement space for the opening / closing mechanism 42. Similarly, a pressure sensor 513 exists between the valve 512 and the exhaust port EP, and it is necessary to secure an arrangement space for the opening / closing mechanism 52.

  Ball valves are generally effective for this type of test because they have a low resistance when opened and a high sealing property when closed. However, since the sealing performance is high, the operating torque required for opening and closing is relatively high, and the actuator serving as the drive source is large. The opening / closing mechanism 42 tends to increase in size as the operating torque increases and the frequency of use increases, and is difficult to reduce in size. Therefore, in a general configuration in which an actuator for opening and closing the ball valve is provided for each ball valve, it is necessary to secure a wide space for the actuator, and there is a limit to shortening the pipe lengths L1 and L2.

  In the present embodiment, the actuator is disposed away from the valve, and the driving force is transmitted via the transmission mechanism. Thereby, the opening and closing of the valve can be automated, and the pipe length can be further shortened. Hereinafter, the configuration on the intake side (the test unit 4, the moving mechanism 6, and the buffer mechanism 7) will be described focusing on the configuration of the opening / closing mechanism 42.

<Intake side configuration>
The configuration of the test unit 4, the moving mechanism 6 and the buffer mechanism 7 will be described with reference to FIGS. 4 is a perspective view of the test unit 4 and the moving mechanism 6. FIG. 5 is a perspective view of the test unit 4 and its surroundings. FIG. 6 is an explanatory view of the lower part of the test unit 4 and is a partially broken view.

The moving mechanism 6 includes an actuator 61, an elevating body 62, and a support body 63. The actuator 61 is, for example, an electric cylinder or an air cylinder, and moves up and down the lifting body 62 by moving the rod 61a back and forth. The test unit 4 is connected to the elevating body 62 via the buffer mechanism 7. Test unit 4 is lowered Ri suspended to the lifting member 62 via the buffer mechanism 7 is lowered by the lifting of the lifting member 62. The support 63 is fixed to a frame F (FIG. 1) that constitutes the skeleton of the test apparatus 1 and guides the lifting / lowering body 62 to move up / down.

  The buffer mechanism 7 is provided between the support unit 43 of the test unit 4 and the elevating body 62 of the moving mechanism 6 and connects these relative positions so that they can be displaced. In the case of this embodiment, four buffer mechanisms 7 are provided, two of which are provided between the support unit 43L and the lifting body 62, and the other two are the support unit 43R and the lifting body 62. It is provided in between. Therefore, the support unit 43R and the support unit 43L can be relatively displaced relative to the elevating body 62 in the Z direction independently of each other. The elevating body 62 includes four attachment portions 62a to which the buffer mechanism 7 is attached. The support unit 43L supports the three pressure inspection units 41L and the opening / closing mechanism 42L. The support unit 43R supports the three pressure inspection units 41R and the opening / closing mechanism 42R. As the support unit 43 is raised and lowered, the pressure inspection unit 41 and the opening / closing mechanism 42 are also raised and lowered.

  The buffer mechanism 7 includes a rod 71, an elastic member 72, and a stopper 73. The rod 71 is a shaft extending in the Z direction, and a support unit 43 is fixed to the lower end portion thereof. The upper end portion of the rod 71 is connected to a part of the elevating body 62. A through hole through which the rod 71 is inserted is formed in the mounting portion 62a, and the rod 71 extends through the through hole to above the mounting portion 62a.

  The stopper 73 is fixed to the rod 71 at a position above the mounting portion 62a. The stopper 73 defines the maximum separation distance of the support unit 43 from the lifting body 62. That is, when the support unit 43 is lowered with respect to the lifting body 62, the rod 71 is also lowered together with the support unit 43. However, when the stopper 73 is engaged with the mounting portion 62a, the lowering of the support unit 43 and the rod 71 is restricted. It will be.

  The elastic member 72 is interposed between the attachment portion 62a and the support unit 43, and constantly urges the elevating body 62 and the support unit 43 in the direction in which they are separated. In this embodiment, the elastic member 72 is a coil spring, and the rod 71 is inserted through the elastic member 72.

  When moving the test unit 4 to the inspection position, the moving mechanism 6 lowers the lifting body 62. In relation to the arrangement of the intake port IP, as shown in FIG. 6, the pipe 411 extends in the Z direction, and the tip 411 a is the lower end of the pipe 411. Since the test unit 4 can be relatively displaced in the Z direction with respect to the lift 62 when the tip 411a of the pipe 411 contacts the opening periphery of the intake port IP, the tip 411a and the opening periphery of the intake port IP The impact at the time of contact is buffered. Further, by the urging of the elastic member 72, the distal end portion 411a can be pressed against the peripheral edge of the opening of the intake port IP to improve the airtightness.

  In addition, since the test unit 4 is connected to the elevating body 62 via the rod 71 and the stopper 73, the elevating body 62 and the test unit can be replaced even when the test unit 4 is replaced when the model of the engine E is changed. Separation from 4 is facilitated and replacement work can be performed smoothly. Further, since the elastic member 72 is provided, the force adjustment at the time of contact between the pipe 411 and the opening peripheral edge of the intake port IP is automatically adjusted during the test operation of the test unit 4 after replacement, which is necessary for the test. Various operation settings are also facilitated. Such a buffer mechanism may be provided between the test unit 5 and the moving mechanism 8.

  Next, the configuration of the opening / closing mechanism 42 will be described. In the present embodiment, the opening / closing mechanism 42 is provided for each cylinder row of the engine E (for each bank). The opening / closing mechanism 42L corresponds to the left bank as viewed in FIGS. 1 and 2, and the opening / closing mechanism 42R corresponds to the right bank. The opening / closing mechanism 42L and the opening / closing mechanism 42R have the same configuration. Hereinafter, the configuration of the opening / closing mechanism 42 will be described with reference to FIGS. FIG. 7 is an explanatory view of the lower part of the test unit 4, and is a partially cutaway view of the opening / closing mechanism 42. 8A to 8C are explanatory views of the operation of the opening / closing mechanism 42. FIG.

  The opening / closing mechanism 42 includes an actuator 421 and a transmission mechanism 422. The actuator 421 outputs a driving force, and the transmission mechanism 422 is connected to the actuator 421 and transmits the driving force to each operation unit 412a of a plurality of valves 412 (three valves 412 in this embodiment).

  One actuator 421 is provided in one opening / closing mechanism 42. That is, each of the opening / closing mechanisms 42L and 42R includes one actuator 421.

  In the present embodiment, the actuator 421 is an air cylinder or an electric cylinder, and includes a rod 421a that extends in the cylinder row direction (Y direction) and advances and retreats in the cylinder row direction (Y direction). The actuator 421 is disposed on one end side of the test unit 4 when viewed in the cylinder row direction (Y direction). In view of the relationship with the pipe 411, the pipe 411 is arranged away from the pipe 411 on one end side in the arrangement direction of the pipe 411. As described above, in this embodiment, the arrangement space of the actuator 421 does not affect the pipe lengths L1 and L2 (FIG. 3).

In this embodiment, the transmission mechanism 422 constitutes a link mechanism using the actuator 421 as a drive source. The transmission mechanism 422 includes a handle member 4221, a slide member 4222, a link member 4223, and a rail member 4224. The handle member 4221 and the link member 4223 are provided for each valve 412. Therefore, the handle member 4221 and the link member 4223 of the opening / closing mechanism 42L are each three, and the handle member 4221 and the link member 4223 of the opening / closing mechanism 42R are also respectively three.

  One slide member 4222 and one rail member 4224 are provided in one opening / closing mechanism 42. Therefore, there is one slide member 4222 and one rail member 4224 of the opening / closing mechanism 42L, and one slide member 4222 and one rail member 4224 of the opening / closing mechanism 42R.

  As shown in FIG. 8, the handle member 4221 is a plate-like member that has an operation portion 412a connected to one end thereof and extends in a direction orthogonal to the axial direction of the operation portion 412a. By rotating the handle member 4221 around the axial direction of the operation unit 412a, the operation unit 412a rotates and the valve body 412b rotates. A cylindrical engagement portion 4221a is provided at the other end of the handle member 4221. The engaging portion 4221a is, for example, a roller that is rotatably fixed to the handle member 4221.

  The slide member 4222 and the rail member 4224 are extended in the cylinder row direction (Y direction). The rail member 4224 is supported by the support unit 43 and guides the movement of the slide member 4222 in the cylinder row direction (Y direction). The slide member 4222 is provided on the upper side of the rail member 4224, engages with the rail member 4224, and is slidable in the cylinder row direction (Y direction).

  A connection portion 4222a is provided at one end of the slide member 4222, and the tip of the rod 421a is fixed to the connection portion 4222a. When the rod 421a is driven forward / backward by driving the actuator 421, the driving force is transmitted, and the slide member 4222 moves in the cylinder row direction (Y direction).

  Three link members 4223 are connected to one slide member 4222. The link member 4223 includes a vertical plate-shaped upper portion fixed to the slide member 4222, a vertical plate-shaped lower portion including the engaging portion 4223a, and a horizontal plate-shaped intermediate portion connecting the upper portion and the lower portion. . In this embodiment, the engaging portion 4223a is a groove opened downward, and the lower portion of the link member 4223 has a crab claw shape or a spanner shape. The engaging portions 4221a of the handle member 4221 are inserted into the engaging portions 4223a and engage with each other. As an opposite configuration, the engaging portion 4221a of the handle member 4221 may be replaced with a crab claw shape or a spanner shape, and the link member 4223 may be a roller corresponding to the engaging portion 4221a.

  Note that the connection structure of the link member 4223, the slide member 4222, and the link member 4223 is not limited to the above-described configuration, and various configurations can be employed.

  The opening / closing operation of the valve 412 by the opening / closing mechanism 42 will be described with reference to FIGS. FIG. 8A shows an aspect of the opening / closing mechanism 42 when the valve 412 is closed, for example. When the rod 421a moves forward by driving the actuator 421, the slide member 4222 slides in the Y direction (leftward in FIG. 8), and the three link members 4223 connected to the slide member 4222 move in parallel in the Y direction.

  At this time, the engaging portion 4221a of the handle member 4221 is moved and guided along the groove of the engaging portion 4223a to move to the inner side of the groove, and the handle member 4221 is moved to the operating portion 412a as shown in FIG. Rotate as center. In this manner, the link member 4223 rotates the handle member 4221 around the axis of the operation unit 412a in conjunction with the slide of the slide member 4222, and rotates the operation unit 412a. As a result, the valve body 412b also rotates.

  When the handle member 4221 rotates in proportion to the sliding amount of the slide member 4222 and the handle member 4221 rotates 90 degrees from the state of FIG. 8A, the state of FIG. 8C is obtained. At this time, the valve 412 is opened. When the rod 421a is retracted by driving the actuator 421, the state shown in FIG. 8C can be returned to the state shown in FIG. The three valves 412 are simultaneously opened and closed for each bank.

Thus, in this embodiment, the opening and closing of the valve 412 can be automated. The actuator 421 is disposed on one end side in the cylinder row direction (Y direction) of the slide member 4222 and is disposed away from the pipe 411 on one end side in the arrangement direction of the pipes 411. It does not affect the pipe lengths L1 and L2 (FIG. 3). Therefore, even if the torque required to open / close the valve 412 increases or higher durability is required as the number of opening / closing increases, the piping of the actuator 421 must be increased. There is no need to consider the influence on the lengths L1 and L2, and the degree of freedom in design is improved.

  As a result, as shown in FIG. 6, in this embodiment, the valve 412 and the pressure sensor 413 are adjacent to each other in the direction perpendicular to the longitudinal direction of the pipe 411 (here, the horizontal direction), and the pipe lengths L1 and L2 A configuration in which (FIG. 3) is shorter is realized.

  In the transmission mechanism 422, the handle member 4221 and the link member 4223, which are the components around the valve 412, are configured by plate-like members, and the exclusive space for these is reduced. In particular, the link member 4223 is formed by bending an upper portion, an intermediate portion, and a lower portion in a crank shape, and a portion adjacent to the valve 412 is only a lower portion including the engaging portion 4223a. As a result, a configuration is realized in which the handle member 4221 and the lower part of the link member 4223 are arranged in the gap (narrow space) between the valve 412 and the pressure sensor 413.

<Exhaust side configuration>
The opening / closing mechanism 52 is different from the opening / closing mechanism 42 in that the number of valves to be opened / closed is one, but the other configuration can be the same. For example, the opening / closing mechanism 52 may have the same configuration in the opening / closing mechanism 42, with one handle member 4221 and one link member 4223. In a configuration in which the collective exhaust port assumed in the present embodiment is not employed and a plurality of exhaust ports EP are provided in one bank, the opening / closing mechanism 52 can have the same configuration as the opening / closing mechanism 42.

Claims (8)

A test unit for testing a multi-cylinder engine having a plurality of ports including an intake port and an exhaust port in a simulated driving state,
Multiple pressure testing units;
And at least one opening and closing mechanism,
Each of the plurality of pressure inspection units includes:
Piping connected to one of the plurality of ports;
A valve for opening and closing the pipe,
The pipe is provided at a position between the intake port or the exhaust port and the valve, and includes a mounting portion to which a sensor for detecting a pressure in the pipe is attached.
The opening and closing mechanism is
One actuator,
Which is connected to the actuator, and transmits the driving force of the actuator to the operating portion of the plurality of valves, Bei example and a transmission mechanism for opening and closing said plurality of valves,
The transmission mechanism is
A sliding member that is slidable in the cylinder row direction by driving the actuator;
A handle member having one end connected to each operation portion of the plurality of valves;
A distal end side is engaged with the other end portion of the handle member, and a base side is provided with a link member fixed to the slide member, respectively.
A test unit characterized by that. The test unit according to claim 1,
The plurality of link members are provided to be bent in a crank shape, and include an upper portion, an intermediate portion, and a lower portion, and the lower portion includes the engaging portion.
A test unit characterized by that . The test unit according to claim 1,
Provided with a sensor for detecting a pressure in the pipe provided in the mounting portion;
A test unit characterized by that . The test unit according to any one of claims 1 to 3 ,
The plurality of ports includes a plurality of intake ports,
Each pressure inspection unit of the plurality of pressure inspection units is provided in each intake port of the plurality of intake ports,
The opening / closing mechanism is provided for each cylinder row,
A test unit characterized by that. The test unit according to any one of claims 1 to 4 ,
The operating portion is a valve stem;
The handle member is connected to the valve stem ;
The link member rotates the handle member around the valve shaft in conjunction with the slide of the slide member ,
The actuator is disposed on one end side in the cylinder row direction of the slide member, and biases the slide member in the cylinder row direction.
A test unit characterized by that. The test unit according to any one of claims 1 to 3,
A support unit for supporting the plurality of pressure inspection units;
A moving mechanism for moving the support unit between an inspection position where the pipe is connected to the port and a retracted position where the pipe is separated from the port;
A test unit characterized by that. A test apparatus for testing a multi-cylinder engine having a plurality of ports including an intake port and an exhaust port in a pseudo drive state,
Multiple pressure testing units;
And at least one opening and closing mechanism,
Each of the plurality of pressure inspection units includes:
Piping connected to one of the plurality of ports;
A sensor for detecting the pressure in the pipe;
A valve for opening and closing the pipe,
The test apparatus comprises:
A support unit for supporting the plurality of pressure inspection units;
A moving mechanism for moving the support unit between an inspection position where the pipe is connected to the port and a retracted position where the pipe is separated from the port;
Said support unit and provided between said moving mechanism further example Preparations and buffer mechanism, a connecting these relative positions displaceably,
The opening and closing mechanism is
One actuator,
A transmission mechanism that is connected to the actuator and transmits a driving force of the actuator to each operation unit of the plurality of valves to open and close the plurality of valves.
A test apparatus characterized by that. A test apparatus for testing a multi-cylinder engine having a plurality of ports including an intake port and an exhaust port in a pseudo drive state,
Multiple pressure testing units;
And at least one opening and closing mechanism,
Each of the plurality of pressure inspection units includes:
Piping connected to one of the plurality of ports;
A sensor for detecting the pressure in the pipe;
A valve for opening and closing the pipe,
The test apparatus comprises:
A support unit for supporting the plurality of pressure inspection units;
A test position in which the pipe is connected to the port, the lifting mechanism the pipe between a retracted position spaced from said port, for elevating the support unit,
Said support unit and disposed between said lifting mechanism further example Preparations and buffer mechanism, a connecting these relative positions displaceably,
The opening and closing mechanism is
One actuator,
A transmission mechanism that is connected to the actuator and transmits a driving force of the actuator to each operation unit of the plurality of valves to open and close the plurality of valves.
A test apparatus characterized by that.

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